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參數(shù)資料
| 型號： | ASM1232LPSF |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 5V uP Power Supply Monitor and Reset Circuit |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封裝： | LEAD FREE, SOIC-8 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 276K |
| 代理商： | ASM1232LPSF |
Alliance Semiconductor
ASM1232LP/LPS
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice
January 2005
rev 1.5
5V μP Power Supply Monitor and Reset Circuit
General Description
The ASM1232LP/LPS is a fully integrated microprocessor
supervisor. It can halt and restart a “hung-up” microprocessor,
restart a microprocessor after a power failure. It has a
watchdog timer and external reset override.
A
comparator circuits monitor the 5V, V
CC
input voltage status.
During power-up or when the V
CC
power supply falls outside
selectable tolerance limits, both RESET and RESET become
active. When V
CC
rises above the threshold voltage, the reset
signals remain active for an additional 250ms minimum,
allowing the power supply and system microprocessor to
stabilize. The trip point tolerance signal, TOL, selects the trip
level tolerance to be either 5% or 10%.
precision
temperature-compensated
reference
and
Each device has both a push-pull, active HIGH reset output
and an open drain active LOW reset output. A debounced
manual reset input, PBRST, activates the reset outputs for a
minimum period of 250ms.
There is a watchdog timer to stop and restart a microprocessor
that is “hung-up”. The watchdog timeouts periods are
selectable: 150ms, 610ms and 1200ms. If the ST input is not
strobed LOW before the time-out period expires, a reset is
generated.
Devices are available in 8-pin DIP, 16-pin SO and compact 8-
pin MicroSO packages.
Key Features
5V supply monitor
Selectable watchdog period
Debounce manual push-button reset input
Precision temperature-compensated voltage reference
and comparator.
Power-up, power-down and brown out detection
250ms minimum reset time
Active LOW open drain reset output and active HIGH
push-pull output
Selectable trip point tolerance: 5% or 10%
Low-cost surface mount packages: 8-pin/16-pin SO, 8-pin
DIP and 8-pin Micro SO packages
Wide operating temperature -40°C to +85°C (N suffixed
devices)
Applications
Microprocessor Systems
Computers
Controllers
Portable Equipment
Intelligent Instuments
Automotive Systems
Typical Operating Circuit
Block Diagram
ASM1232LP/LPS
ST
RESET
GND
TD
TOL
I/O
RESET
μP
10k
+5V
Tolerance Selection
Reference
Push Button
Debounce
Voltage Sense
Comparators
Watchdog Transition
Detector
Reset &
Watchdog Timer
+
-
RESET
RESET
PBRST
ST
TD
TOL
V
CC
GND
40k
V
CC
ASM1232LP/LPS
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PDF描述 |
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| ASM1232LPSN | 5V uP Power Supply Monitor and Reset Circuit |
| ASM1233AZ-15 | Low Power, 3.3V, uP Reset, Active LOW, Open-Drain Output |
| ASM1233A | KJ 6C 6#22 PIN PLUG |
| ASM1233D-10 | Low Power, 5V/3.3V, uP Reset, Active LOW, Open-Drain Output |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ASM1232LPSN | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:5V uP Power Supply Monitor and Reset Circuit |
| ASM1232LPSN- | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:5V uP Power Supply Monitor and Reset Circuit |
| ASM1232LPSN-2 | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:5V μP Power Supply Monitor and Reset Circuit |
| ASM1232LPSN-2F | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:5V μP Power Supply Monitor and Reset Circuit |
| ASM1232LPSNF | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:5V uP Power Supply Monitor and Reset Circuit |
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